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參數資料
型號: W88227QD
廠商: WINBOND ELECTRONICS CORP
元件分類: 消費家電
英文描述: ATAPI CD-ROM Decoder(支持ATAPI標準的CD-ROM解碼器)
中文描述: SPECIALTY CONSUMER CIRCUIT, PQFP128
封裝: LQFP-128
文件頁數: 17/116頁
文件大小: 787K
代理商: W88227QD
Preliminary/Confidential
Subject to change without notice
W88227F/W88227QD
- 13 -
1999/10/1 Rev: 0.70
2.1.5 IDE Programming Mode
This chip enters
IDE Programming Mode
when the last initiation key is written to Control Port. The status
can be verified by read
IDE Programming Ready Signature (E8h)
from Feature Port.
2.1.5.1 Pin Mapping
Flash Pin Name
W88227 Pin Name
Function
A15-8
UP27-UP20
Address High
A7-0
A7-0
Address Low
DQ7-0
UP07-UP00
Data
CEN
GPIO2/DAOUT/nFCE
Chip Enable
OEN
PSEN
Output Enable
WEN
GPIO1/nFWE
Write Enable
2.1.5.2 IDE Programming Sequence
The following sequence is only an example. Please properly adjust it to fit the specification of different Flash.
1. Select the drive
2. Write
Initiation Key
to 1F3h/173h
3. Read 1F3h/173h to verify
IDE Programming Ready Signature (E8h)
4. Write address to 1F4h/174h and 1F5h/175h
5. Write data to 1F1h/171h
6. Activates NFCE by writing 04h to 1F2h/172h
7. Activates NFWE by writing 05h to 1F2h/172h
8. Releases NFWE by writing 04h to 1F2h/172h
9. Go back to step 4 until all data are written
10. Write address to 1F4h/174h and 1F5h/175h
11. Activates NFOE by writing 06h to 1F2h/172h
12. Read from 1F1h/171h to verify data
13. Releases NFOE by writing 04h to 1F2h/172h
14. Go back to step 10 until all data are verified
15. DEVICE RESET (re-start uP program counter from 0) or Re-boot
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